Update Google Tag Manager (GTM) plugin to subscribe to "events" for preference changes

[eastandwestwind]

As a web developer, I want to add the Fides components to my site and have a simple way to automatically trigger events in my Google Tag Manager (GTM) so that I can enforce consent on my tags via GTM.

Details

Basically, we should update the existing Fides.gtm() plugin to automatically subscribe to events

We need to ensure that the GTM data layer is updated whenever the preferences change, including:

• Initializing the script to “defaults” based on the user’s geolocation
• User saving their preferences from the modal
• User rejecting all notices from the banner
• User accepting all notices from the banner

etc.

AC

• When I’ve added Fides consent to my site, then I can call window.Fides.gtm() to enable the Google Tag Manager plugin
• When I’ve enabled the Google Tag Manager plugin, then I should receive an event in GTM when the window.Fides.consent object is initialized
• When I’ve enabled the Google Tag Manager plugin, then I should receive an event in GTM when the window.Fides.consent object is updated by the user (saving preferences from modal, rejecting notices from banner, accepting notices from banner, etc.)

[NevilleS]

Did some quick research and this is super simple - just need to do dataLayer.push({ event: "<event name>", ...eventData })

See https://developers.google.com/tag-platform/tag-manager/web/datalayer

[NevilleS]

Closed by #3454

[Roger-Ethyca]

moving to done